论文信息 - Pressure-induced superconductivity in a ferromagnet, UGe2: resistivity measurements in a magnetic field

Pressure-induced superconductivity in a ferromagnet, UGe2: resistivity measurements in a magnetic field

Electrical resistivity measurements in a magnetic field are carried out on UGe2 which exhibits pressure-induced superconductivity. The superconductivity is observed from 1.06 to 1.44 GPa. In the temperature and field dependences of the resistivity at P > PC where the ferromagnetic ordering disappears, it is observed that the application of an external field along the a-axis increases the coefficient A of the Fermi-liquid behaviour (∝ AT2) abruptly—corresponding to the metamagnetic transition. The characteristic enhancement of HC2 is reconfirmed for H ∥ a-axis. The upper critical field of HC2 is anisotropic: HC2 (T) exhibits positive curvature for H ∥ b-axis and H ∥ c-axis.

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